                        July 28, 1978
SB-300                                          Bulletin No:
SSB Receiver                                    SB-300-1

                         Intermittent IF Oscillation

If the Mode switch shaft is not grounded properly, it can cause capactive
coupling between the input and output stage switch wafers for the IF
amplifier.

Check for loose setscrews in the shaft coupler near the Mode switch
detent.  Retighten if necessary.
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                        July 28, 1978
SB-300                                          Bulletin No:
SSB Receiver                                    SB-300-2

                       LMO Drift; Intermittent Frequency Shift

Check for a dirty or corroded phono conector on the rear of the LMO.
Clean if necessary.
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Thats everything I hold up to 1989 that covers the SB-300.  Enjoy!
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